Door lock



Nov. 7, 1939. F. A aowNE DOOR LOCK Filed April 14, 1938 INVENTOR.

role n6 064F691 9 M.

BY fioya /i B ATTORNEYS.

Patented Nov. 7, 1939 STATES PATENT OFFECE DOOR LOCK Floyd A. Browne, Cleveland, Ohio, assignorof onehalf to J. D. Overholt, Woostenflhio Application April 14, 1938,Serial"No. 202,004

2 Claims.

This invention relates broadly to locks of that class which are used for closurm, where it is desirable to operate a locking mechanism or latch bolt from either side of the closure by means of pivotally articulated and fulcrumed levers. Pushing down the outer actuating lever that extends beyond the exterior surface of the closure retracts the latch bolt, while the lifting up of the actuating lever that extends beyond the interior surface of the closure likewise retracts the latch bolt, leaving the outer lever inactive. A locking instrumentality is provided to prevent actuation of the outer lever, while the inner lever is free from its locking influence. However, a

' key is used to release the latch bolt, leaving the outer lever in its locked or dogged position. When the outer lever is free from the locking instrumentality, it acts in unison therewith, because .of the construction of the articulation or joint in the lever members.

Broadly, it is an object of this invention to provide for a novel door lock mechanism comprising articulated lever members tiltable on a common fulcrum whereby on movement of said a levers, through inter actuated movement transmitting means, a movement of translation will be imparted to a latch bolt to release the same.

Other objects of the invention will appear from the following description:

The invention consists substantially in the construction, combination and arrangement .of parts associated therewith or as will be more fully hereafter set forth as shown in the accompanying drawing and finally pointed out in the appended claims.

Reference is to be had to the accompanying drawing forming part of this specification in which like reference characters indicate corresponding parts throughout the several views, and in which:

Figure 1 is an elevation seen from the rear of the lock, the cover being removed, showing one illustrative form for carrying out the invention.

Figure 2 is a fragmentary view of a door stile, the outer actuating lever, and a sectional view of the escutcheon plate with its cover, the lever is shown pushed down in the chain lines.

Figure 3 is a plan view of the main bearing showing its construction.

Figure 4 is an enlarged fragmentary plan view of the articulated lever portions.

Figure 5 is an enlarged fragmentary side view of the articulated lever portions.

Figure 6 is an enlarged cross-sectional view of the articulated levers taken on line A-A in Figure 5.

Referring now to the drawing, the numeral ll! designates va conventional casing or housing for supporting the parts of the lock mechanism, (the cover of the casing not shown but understood in the art). A main bearing ll having integrally formed-portions l2.and 13, a slot l4 and fulcrum bearingsJB-and IE, seeFigure 3, may be removably mounted in:the casing. This main bearing is previdedto accommodate the articulated actuating levers hereafter described.

In the casing thereis provided a latch bolt I! with a camming strike engaging face It. This latch bolt is provided with a shank 19 having fast thereon and at:the end thereof an oblong plate :29. Onthe shank there is provided a helical spring 2|. :This springisinterposed between theinner side-2'2 of the latch' bolt and'the guiding block23 secured to, or'formed integrally with the casing.

The principal actuating lever 24 is pivotally mounted in the casing on the pivot or post 25 and has an upwardlyextendingarm 26 and a corner portion 72'! removed therefrom. This upwardly extending portion at or adjacent its end 28 engages:the inner surface 29 of the oblong plate fast on :the end of the latchbolt shaft. W'hen proper tforceis applied to the convenient lever to actuate the principal actuating lever, the latch bolt is retracted against the pressure. exerted by thehelicalspring surrounding the shank of the latch bolt.

Theauxiliary lever 30 is actuated by the cam 3! of the ordinary .key-actuated barrel or plug 32. The lever 30' is pivotally mounted on the pivot or post 33 anddtsupper end .34 passes freely beneath the shankof the latch bolt, and is interposed between the guiding block and the oblong plate on the latch bolt. When the outer actuating lever is dogged, as-hereinafter described, the latch bolt can be retracted by operating the barrel or plug, a key being inserted from the rear of the barrel or plug as ;it. appears in Figure 1, and turned clockwise.

The .outer'lever dogging instrumentality 35 is positioned below the latch bolt, and is provided with a backwardtravel limiting face 35 adapted to position the dogging face 3'! projecting into the path of the outer actuating lever 48 so that it will not interfere with the movement of the undogged, lever 49. This dog is provided with a shank 38 having a helical spring 39 therearound and interposed between the guiding block 40 and the shoulder M on the shank. This unit constitutes the night latch push button. Beyond the shoulder'therev is provided a cylindrical portion 42 which passes slidably through and projects into theopening 43. The cylindrical portion 42 is interrupted to provide a flat surface 42 that forms the shoulder 46 against which the up-- ward extending portion 44 of the pawl 44 engages to hold the .dog35 in dogging position. A partof the portion .42 and the forward end of the pawl 44 projects through an opening or slot in the face plate A of the lock. The pawl 44 is manually pressed downward to release the shaft 38. Positioned below the shank of the dog instrumentality there is provided a hooked end pawl 44 pivotally mounted on a pivot or post 45 and held in spring-pressed engagement with a shoulder 46 by means of a suitable spring 41. The pawl or stop is adapted to hold the dog in dogging position relative to the outer lever. To release the dog, the pawl is pressed downwardly, with the result that the dog is moved away from the lever by means of the helical spring.

The articulated levers 48, 4'9 consist of two sections 48 and 49. The portion 48 is intended to project to the rear of the casing as shown in Figure 1, so that when mounted in the lock, the lever 48 is to the exterior of the door, hence the pressure is down as shown by the dot-and-dash line with arrow-head 50 in Figure 1, Figure 2, and Figure 5. It will be noted in the enlarged Figures 4, 5 and cross-sectional view Figure 6 that the member 48 is provided with a removable abutment pin 5|, and above the pin, a bore 52 for the reception of the abutment pin 5! in reversing the levers. In the member 49 there is provided a notch 53 for the reception of the pin 5| and thereabove a notch 54 similar to the notch below; this notch is provided to receive the pin in reversing the levers in meeting the exigencies of use, should the exterior and interior of the closure be reversed from that shown in Figure 1. When the levers are mounted as shown in Figure 1, the bearing IS in the bearing II is used to accommodate the fulcrum 55 in the levers. When the levers are reversed the bearing I6 is used in the bearing lock 1 l.

The escutcheon plate 56 has a spherical surface 5'5 and is provided with an elongated slot 58 to permit actuation of the lever that extends therethrough.

The slot is covered by a cover plate 59 that fits the spherical surface of the escutcheon plate and conceals the slot therein. The cover is provided with a square through opening 60 for the reception of the lever that passes therethrough. The escutcheon is shown attached to a stile of a door iii. The lever members may be made to accommodate different thicknesses of door stiles. Any suitable handle or knob may be removably mounted on the lever members, hence not shown.

It is believed that the operation of the mechanism as a whole will be clear, in view of the foregoing description which has been given in connection with that of the construction of the same.

While I have illustrated a particular embodiment of the device efiective to operate as hereinbefore described, I do not wish to be limited thereto, as many modifications may be made without departing from the spirit and scope of my invention and I desire, therefore, that only such limitations shall be placed thereon as are imposed by the prior art or are specifically set forth in the appended claims.

XVhat I claim as my invention and desire to secure by Letters Patent is:

l. A lock of the class described comprising a normally projecting latch bolt member, a main bearing having plural bearings therein, a plate fast on an end of the projecting latch bolt member, means for retracting the latch bolt member comprising a pivotally mounted plate-engaging lever, an articulated lever having means for actuating said plate-engaging lever, said articulated lever comprising an exterior lever portion and an interior lever portion, one end of each of the aforesaid lever portions having an integrally formed end portion overlapping an integrally formed end portion on the other lever portion, a common fulcrum, the said common fulcrum being positioned centrally of and intermediate the length of the overlapping portions, the common fulcrum being mounted in one of the plural bearings in the main bearing, the other of the said plural bearings being free, the free bearing of the plural bearings being adapted to receive the common fulcrum when the lever portions are reversed, a removable threaded abutment pin, the aforesaid pin being positioned in the overlapping portion of the exterior lever portion and inwardly of the common fulcrum, the aforesaid overlapping portion also having a threaded bore positioned above the removable pin, the overlapping portion of the interior lever portion being provided with a notch, adapted to receive the pin in the exterior overlapping portion as mounted, and further having a notch positioned above the aforementioned notch adapted to receive the removably mounted abutment pin when the lever portions as a whole are reversed, the common fulcrum being mounted in the free bearing in the plural bearings in the main bearing when thus reversed, the said removably mounted abutment pin as mounted in the exterior overlapping lever portion acting in conjunction with the exterior lever portion and the interior lever portion so that on movement in one direction a solid lever is produced so that when the exterior lever portion is forced down the pivotally mounted plate-engaging lever is actuated, thereby releasing the latch bolt, and when the interior portion of the lever portions is lifted up the pivotally mounted plate-engaging lever may be actuated independently of the. exterior lever portion, a night latch push button, said night latch push button having a backward travel limiting face and a dogging face adapted to position said dogging face into the path of the overlapping portion of the exterior lever portion so that it will not interfere with the actuation of the. undogged interior lever portion, means to hold the night latch push button in dogged position, and a pivotally mounted key actuated auxiliary lever having means to retract the projecting latch bolt from the exterior when the exterior portion of the lever portions is dogged.

2. In a lock comprising a normally projecting latch bolt member, a plate fast on an end of said latch bolt member, levers for retracting said latch bolt member comprising two articulated lever portions having a common fulcrum acting independently and in concert, a pivotally mounted principal actuating lever adapted to engage the plate fast on the latch bolt member, an abutment pin in one of the aforesaid articulated levers, the other of the said levers having an abutment pin receiving notch, the aforesaid abutment pin and notch acting in concert on forcing down one of the lever portions thereby engaging and actuating the pivotally mounted principal actuating lever that engages the plate on the latch bolt to retract the same, the levers being further constructed to allow movement of one of the said lever portions to act independently of the other to retract the latch bolt.

FLOYD A. BROWNE. 

